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re PR c++/52818 (printf format %lf is erroneously rejected by C++11) 

PR c++/52818
	* c-format.c (CPLUSPLUS_STD_VER): C++11 inherits from C99.
	(C_STD_NAME): Distinguish between C++98 and C++11.

From-SVN: r186468
This commit is contained in:
Jason Merrill 2012-04-15 13:07:30 -04:00 committed by Jason Merrill
parent 79617d7e2e
commit 04b391c164
4 changed files with 21 additions and 2 deletions
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6
gcc/c-family/ChangeLog
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@ -1,3 +1,9 @@
2012-04-15 Jason Merrill <jason@redhat.com>
PR c++/52818
* c-format.c (CPLUSPLUS_STD_VER): C++11 inherits from C99.
(C_STD_NAME): Distinguish between C++98 and C++11.
2012-04-11 Eric Botcazou <ebotcazou@adacore.com>
PR target/52624

5
gcc/c-family/c-format.c
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@ -334,7 +334,7 @@ decode_format_attr (tree args, function_format_info *info, int validated_p)
/* The C standard version C++ is treated as equivalent to
or inheriting from, for the purpose of format features supported. */
#define CPLUSPLUS_STD_VER STD_C94
#define CPLUSPLUS_STD_VER (cxx_dialect < cxx11 ? STD_C94 : STD_C99)
/* The C standard version we are checking formats against when pedantic. */
#define C_STD_VER ((int) (c_dialect_cxx () \
? CPLUSPLUS_STD_VER \
@ -345,7 +345,8 @@ decode_format_attr (tree args, function_format_info *info, int validated_p)
pedantic. FEATURE_VER is the version in which the feature warned out
appeared, which is higher than C_STD_VER. */
#define C_STD_NAME(FEATURE_VER) (c_dialect_cxx () \
? "ISO C++" \
? (cxx_dialect < cxx11 ? "ISO C++98" \
: "ISO C++11") \
: ((FEATURE_VER) == STD_EXT \
? "ISO C" \
: "ISO C90"))

5
gcc/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2012-04-15 Jason Merrill <jason@redhat.com>
PR c++/52818
* g++.dg/warn/format8.C: New.
2012-04-15 Janus Weil <janus@gcc.gnu.org>
PR fortran/51082

7
gcc/testsuite/g++.dg/warn/format8.C Normal file
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@ -0,0 +1,7 @@
// PR c++/52818
// { dg-options "-pedantic-errors -Wformat" }
extern "C" int printf (const char *, ...);
void f() {
printf("%lf", 0.0); // { dg-warning "%lf" "" { target c++98 } }
}